Finding the Fourth Proportional to 21,364.45, 29,480.83 and 12,412.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,364.45 : 29,480.83 = 12,412.33 : x
2. Step 2: Convert to fraction form
   21,364.45/29,480.83 = 12,412.33/x
3. Step 3: Cross multiply
   21,364.45x = 29,480.83 × 12,412.33
4. Step 4: Simplify right side
   21,364.45x = 365,925,685.90
5. Step 5: Solve for x
   x = 365,925,685.90/21,364.45
6. Step 6: Final answer
   x = 17,127.79